An International Dark Sky Reserve is a designated area recognised by the International Dark-Sky Association (IDA) for its exceptional quality of night sky and commitment to preserving darkness for astronomical observation and the enjoyment of natural darkness. These reserves are typically located in remote or sparsely populated areas with minimal light pollution, making them ideal for stargazing and astrophotography.

To earn the designation, a Dark Sky Reserve must meet stringent criteria set by the IDA, including implementing lighting ordinances to minimise light pollution, raising public awareness about the importance of dark skies, and promoting responsible outdoor lighting practices. These reserves often encompass large tracts of land, including national parks, nature reserves, and other protected areas.

International Dark Sky Reserves are not only valuable for scientific research and astronomy but also contribute to environmental conservation efforts by preserving natural habitats and ecosystems that rely on darkness for their ecological balance. Additionally, they provide opportunities for tourism, education, and recreation centred around the appreciation of the night sky and the beauty of the cosmos.

Dark Sky Parks and Dark Sky Reserves are two types of designation, awarded by the International Dark-Sky Association. The awards officially recognise certain locations and areas to be so naturally dark at night and have no light pollution to affect star viewing. This means the Parks and Reserves are officially the best places in the world to stargaze.

The difference between a dark sky park and a dark sky reserve is that a dark sky park is on public lands, that are typically uninhabited and that can be of any size. A dark sky reserve is centred around a core dark sky area, on either private or public land, and the reserves benefit from specific requirements for protecting the “core” from light pollution.

A Dark Sky Discovery Site is a location certified by the Dark Sky Discovery initiative, aimed at promoting stargazing and appreciation of the night sky. These sites are chosen for their minimal light pollution and excellent visibility of the stars, making them ideal for observing astronomical phenomena such as stars, planets, and meteor showers. They often have designated facilities or amenities to enhance the stargazing experience, such as observation platforms, information boards, or guided tours.

The Dark Sky Discovery Sites include The Cambrian Mountains, the National Botanic Garden of Wales, Stackpole Estate, Pembrokeshire, Rhondda Cynon Taf, South Wales and the Clwydian Range.

The UK has some of the largest areas of dark sky in Europe. It’s possible to see around 100 stars in your own back garden, subject to light conditions, however, how about immersing yourself under a dark sky with over one thousand stars? How about spotting the Milky Way – our very own galaxy – across the night sky? If you’ve never seen the full brightness of the Milky Way, take a closer look at the Dark Sky options below and choose the best spot for you. Choose from wild forests to national parks, grab your binoculars and your night vision for the 'night show' at a stargazer’s paradise!

The UK now has more certified international dark-sky places (DSP) than any other country outside the USA. The UK has three Dark-Sky Parks; Northumberland National Park, Elan Valley Estate (Wales) and Galloway Forest Park (Scotland) and a handful of Dark-Sky Reserves, including Brecon Beacons National Park, Exmoor National Park, Snowdonia National Park and the South Down National Park. Plus there are several Dark Sky Discovery Sites.

Six UK National Parks – Exmoor, Brecon Beacons, Moore’s Reserve in the South Downs, Snowdonia, North York Moors and Yorkshire Dales have been awarded International Dark Sky Reserve status. Northumberland, with England’s most pristine dark skies, is an International Dark Sky Park (Gold Tier). Every year, these National Parks celebrate the amazing night sky with Dark Skies Festivals and stargazing opportunities galore. They’re fun events for all the family and one of the highlights of the calendar year.

- View an hour and a half after sunset – when the sky is properly dark. Sunset times vary around the country and around the year– you can check local sunset times See: Sunrise Sun Set Map.
- Moonlight can make it difficult to see the stars as the moonlight can produce too much of its own light. Use a moon calendar to see when the best time is, avoiding full moon, for example. See the Sunrise Sun Set Map.
- Wrap up warm as it’s colder when the sky is clearer, without a layer of insulating cloud!
- Grab a star chart – check out Dark Sky Discovery to show you where to start.
- You can use just your naked eyes, however if you’re ready for the next step, a pair of binoculars or a telescope would be perfect for viewing. A specialist shop can provide advice on what is most suitable for you.
- Invest in a red torch if you want to use light to see which would not affect your night-time vision as much as a standard torch could do.
- Be patient – it can take up to 10 minutes for your eyes to fully adjust to the dark.

Websites and Apps for Stargazing

Websites for Stargazing

• Sky & Telescope Offers star charts, guides to observing celestial events, and educational articles on astronomy.

• Stellarium Web A free, browser-based planetarium that shows the sky in real-time based on your location.

• Heavens-Above Tracks satellites, the ISS, and offers detailed star maps and astronomy resources.

• Time and Date – Night Sky Provides custom night-sky maps, information about celestial events, and visibility guides.

• Dark Site Finder Helps locate dark-sky areas for optimal stargazing.

• Astronomy.com Features news, tips, and interactive tools for skywatching enthusiasts.

Apps for Stargazing

Star Map Apps

• SkySafari (iOS/Android) Advanced star map and telescope control. Great for serious astronomers.

• Star Walk 2 (iOS/Android) Interactive guide to the night sky with beautiful visuals and AR features.

• Stellarium Mobile (iOS/Android) A mobile version of Stellarium Web with detailed star maps and constellation views.

• Night Sky (iOS) AR-powered app that identifies celestial objects by simply pointing your device.

• SkyView (iOS/Android) User-friendly with real-time tracking of stars, planets, and satellites.

Event Tracking Apps

• ISS Detector (iOS/Android) Tracks the International Space Station and other satellites.

• Solar Walk 2 (iOS/Android) Focuses on our solar system with a 3D model and planet tracking.

• Sky Tonight (iOS/Android) Provides daily highlights of celestial events and night-sky guides.

Planning Tools

• Clear Outside (iOS/Android) Predicts stargazing conditions with cloud cover, visibility, and light-pollution data.

• Light Pollution Map (iOS/Android) Helps find the darkest skies for stargazing by showing light-pollution levels worldwide.

• Starry Night (iOS/Android) Combines a detailed planetarium experience with observing guides.